24 Nov
2013
24 Nov
'13
11:58 a.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Mouse
Verzonden: zondag 24 november 2013 20:10
Aan: cctalk at classiccmp.org
Onderwerp: Re: HP-150 Touchscreen
I suspect my cables are the designed-for-computer sort. Not only did I
get them
The
cables I have do not look like the Wikipedia page picture; they
have matte metal shells with black screws rather than black shells
with metallic-appearing screws. [...]
There are different version of the HP-IB
cables sold by HP, some have
molded connectors others have metal connector. Some cables are
shielded heavily others have a less thick shielding, the standard
instrumentation HP-IB bus has a transfer rate from 250-500kB/s.
Later they developed the High speed HP-IB bus for data transport
between computers and peripherals, this bus is terminated and has a
transfer rate of 5MB/s. with computers, they look _ridiculously_ heavily
shielded.
Before I left Montreal, a friend was visiting and looking at that stuff.
I have an
HP-IB disk drive that holds about half a gig and
weighs about half what I
do; he
looked at it and the cables and said it might be
heavy, but when they nuke
Montreal it's not going to even _notice_ the EMP. I think that was an
exaggeration, but that's sure how they look.
I do not, however, have any terminators, nor any indication that they
might be
necessary, nor even desirable.
Termination is internal not external like scsi.
The HS controllers have an option to place the termination resistors on
board.
The discs and tape drives are terminated or have a firmware option to
enable/disable the termination.
From the 9000/300 series only the 360 and up 380/382
etc.. are equipped with
the HS controller.
-Rik